How to do Hospital Wiring?
Ok, here is a definitive article on how to set up Hosptial wiring – hands on. Read on – List of material needed – 1)...
Tunnel Wiring
Here is a definitive way to set up Tunnel Wiring by yourself – List of Materials needed 1) 230 V, 5A SPDT switches – 3...
Hands on Wiring – Godown Wiring
Ok, here is a definitive article on how to set up godown wiring – hands on. Read on – List of material needed – 1)...
Fuse is provided only in phase and never on nuetral, Why?
The main function of a fuse is to protect the electrical appliances connected in a building from damage by blowing out under faulty or high voltage...
Wiring Practice – Staircase wiring
A simple and practical way to set up staircase wiring is explained here. To operate a lamp from two different points by two switches at...
Sample Linux server (web centric) back up script in PERL
Below is a sample, detailed, PERL script for backing up your web centric Linux server. It includes ways to creating tgz of required areas, pushing...
Paper – Server Synchronization Technology for a Distributed server architecture (DSA)
Requirement: Company xyz has now decided to extend the current system as distributed server architecture, expanding over 46 locations. There will be a central server...
Sample Linux-Apache-PHP-DB2 installation instructions
Below is detailed customized installation for Linux-DB2 – 1. Suggested PC configuration for medium sized installations – P4 or above – 256 MB or above...
Sample (cheap) Web application architecture
A sample customized web application architecture is as shown below – As shown above, all the three tiers of the web server architecture, namely database...
Sample PL/SQL script for cleaning a detail table referring a master table
Have you ever had a need to write a PL/SQL snippet to clean a table. If you are in need, here is one below –...
Sample Perl program for cleaning database on a routine basis
Here is a samlpe Perl Program that gives you an outline on how to deal with cleaning DB on a routine basis (ofcourse scheudled via...
Comparing roles of a System Analyst and other IT professionals
A system analyst is a person of multifaceted role who has to deal with each and every function of a system. He is involved in...
Attributes of a Good System Analyst
A system analyst is a person who conducts a methodical study and evaluation of various aspects related to business to identify the desired objectives and...
Decision Table
A decision table represents the comlex decision logic associated with a data-processing job. A decision table summarized the action to be taken depending on the...
System Life Cycle – Classical definition
A system is a set of interacting elements that responds to inputs producing outputs. The events which together make up the development, operation and maintenance of...
Find a root of x = e-x using Regular Falsi Method
Regular Falsi method is a numerical method to derive the root of a polynomial. The advantage of Regular Falsi over Bisection method is that the convergence...
Find a root of x = e-x using Bisection Method
Bisection method is the most simplest method of solving algebraic or transcendental equations. It involves selecting an interval [a,b] in which the root lies such...
What is the backbone of SOA connectivity?
This is a core question that we need to ask when we talk about SOA (Service oriented architecture). SOA connects enterprise components within and outside...
Newton Raphson Method Example – Find root of e-x = Sin X
Newton Raphson method is the core in computer Numerical analysis software programs to find root of equations such as e<sup>-x</sup> = Sin X. Complete solution is...
Best Wire-framing / Prototyping tools
One of the most sought tools for a web designer / UI expert / anyone who wants to mock up a user interface based IT...
Which REST framework should I use
There are multiple Java based REST frameworks that is use today. Some of the top players are as below – 1. Reslet – http://www.restlet.org/...
HTTP Methods – Which HTTP method should I use and what methods are used in REST
HTTP methods are convenient methods that an outside process can use over simple http transport layer. For example REST (Representational transfer technology) uses http methods...
SOA – Service Oriented Architecture explained in layman’s terms
The core concept behind Service oriented Architecture (SOA) is that it is focused on enabling design and implementation of business process as individual service components...
Treating product requirements – The ideal way
Product requirements need to be treated with suspicion as if they really needed for the essential capability for a product release. Always prioritize product requirements...
Product Vision – Rule of Thumb – Simplicity
One would think that the a product’s success is directly proportional to the amount of complexity that it offers. In other words, majority of people...
Agile / Scrum methodology – Explained simple
Agile software development methodology is suitable for time-boxed iterative system development scenarios. The software product is released as various versions or releases, typically in time-boxes...
Numerical solution of a transcendental equation 1.5x – tanx – 0.1 = 0
Solving 1.5x – tanx – 0.1 = 0, using iteration method – Iteration is a method of solving algebraic or transcendental equation and is widely used...
Numerical solution by method of Iteration
Solving x = 1/ (1+x)1/2 using iteration method – Iteration is a method of solving algebraic or transcendental equation and is widely used in computer...
Using Outside Caliper – Physical data gathering
Outside caliper is a two legged precision instrument used for measuring or comparing thickness diameter and outside dimensions. The legs are tapered inwards and their...
Using a Micrometer – Physical data gathering
Micrometer is a precision instrument which is able to take delicate measurements of all classes of materials. In the classification of sizes, what is known...
Mechanical Information Tool – Vernier Caliper
Vernier Caliper is a precision instrument which is used to measure and record data such as length, breadth, thickness etc of a body. The principle...
Basics of Mechanical Fitting and safety
Fitting is the assembling together of parts and removal of metals to secure necessary fit. Following safety measures need to be taken in fitting workshop...
Events and States
Events and States are differentiated below – Events States Anything that happen in time Shows the attributes values of object at a particular point in...
Actors and Data Stores
Actors: Actors are objects represented in the functional model that produce or consume data. An actor may store some data for further processing steps. Data...
State Diagram – Car
The state diagram may be drawn by considering the concurrency property of the aggregate objects that make up the car object ie. each aggregate object...
Object Diagrams with Multiple Inheritance
Below is an example of implementation of multiple inheritance – The Class ‘Universal’ inherits from two classes A/ and D/C, thus exhibiting multiple inheritance. Mutiple...
Main features of Object Oriented Languages – Classes, Objects, Encapsulation, Polymorphism, Inheritance
1. Classes and Objects In an object oriented programming language, we code the program as a corporate collection of objects which are instantiated from various...
Abstraction
Abstraction may be defined as all those essential characteristics features of an object class which makes it different from other object classes. Abstraction as applied...
Multiplicity
Multiplicity refers to the number of object class instances of one class may be associated to the other class. An n+ symbol indicates that there...
Inheritance
Inheritance is the most basic feature of any Object Oriented programming language. It refers to the derivation of sub classes from a base/super class. The...
Qualification
Qualification is an association which involves an association and a qualifier which uniquely identifies certain features of one of the associated classes. Below example explains...
Object Modeling Technique (OMT)
Object Modeling Technique used in object oriented modeling and design which use the usual principles of system development like analysis, design an implementation but applying...
Instance Diagram
A sample instance diagram is as shown below. The diagram represents a expression evaluator –...
Aggregation
Aggregation refers to combining the assembled parts of a single part. In terms of Object Management Technology, aggregation may be defined as representing the object...
Reengineering Principles
The standard Reengineering principles are as follows – 1. Organize work around its end results, not tasks According to this principle, it is optimal to...
Why Companies Do Reengineering?
Companies are doing reengineering since they want to remain stable in the dynamic business environment while facing changing strategies, financial crisis due to weak /...
Reengineering an accounts payable function
Consider the case of approving a loan application. In the manual process, it takes 6 persons and considerable amount of time to accept the details,...
Creating Process based Organizations via Reengineering
While reengineering a business enterprise, we create a process based organization structure for the enterprise to avoid the inefficiencies and time wasting business process cycles...
Basic approaches to Reengineering
The three basic approaches to reengineering are as follows – 1. STREAMLIING 2. INTEGRATING 3. TRANSFORMING 1. Streamlining – Streamlining approach to reengineering the business...
Basic steps in Business Process Reengineering
We can generalize Business Process Reengineering (BPR) efforts as an eight step process as follow – Step 1: Formulate / Modify business visions, policies, objectives...
What is Re-engineering? Why companies are doing re-engineering?
Re-engineering or Business Process Re-engineering (BPR) is way of rethinking or redesigning the existing business systems both in technical and behavioral terms. The ultimate goal of...
Lack of Risk Management and an affected project
A classic example would be the project my company executed before the formal PM processes were implemented. The project’s core requirement was to generate reporting...
Managing the Managers – Showing importance of Risk Management
Suppose you called a meeting with your project team, various experts and the stakeholders, to start the risk planning process. One of the senior people...
Decision Tree / Expected Monetary Value model for risk analysis
EMV is a statistical concept (with a defined formula) which calculates average outcome when there is uncertainty in the final outcome (more than one possible...
Project size driving Project risk
Project size and Project Risk: Another interesting topic in Project Management world. From my experience with software development, I think that project risk increases with...
Addressing risk due to interpersonal issues and incorrect project communication
Interesting question as I wonder this situation (Risk of failure due to interpersonal issues) is often less addressed anywhere. I shall address the situation using formal...
Team Building/Motivation practices
What kind of team-building exercises and/or motivational practices have you used, or participated in? Would you recommend them for use by others? Have you been...
Sample Software Quality Issue
One of the major Software Quality issue that I experienced is with product xyz which my current employer deployed as the Version control and Change...
Quality considerations for software projects
Define one or two aspects of IT product quality that should be considered when planning software project activities. How can they be measured? What are...
Quality Program in a typical organization
What quality programs, formal or informal, have you experienced in your work? How well do you feel they were implemented? What was the level of...